those little acorn blanks are available where ever they have bird/bear scaring guns and those little red and green rockets.
In Oliver BC, Gerrards equipment I believe is a/the supplier for the vineyards in the valley.
Should be:
Gerrards Equipment,
33684 97th St GD
Oliver, BC,
V0H 1T0
250-498-2524
We used to scrape the paper off the top of a green rocket, then tape it to a red one and now have a far shooting explosive warhead, among other dumb ideas. Putting a little of the red rockets explosive dust into the gun made the rockets go farther too, but that was even worse of an idea. Sometimes they just blew apart and exploded.
I'm a big fan of safety glasses after surviving my youth.